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| author | Alina Sbirlea <asbirlea@google.com> | 2019-08-21 17:00:57 +0000 |
|---|---|---|
| committer | Alina Sbirlea <asbirlea@google.com> | 2019-08-21 17:00:57 +0000 |
| commit | 7425179fee9b4ed1ff6d366ee06487f05a1c0ab3 (patch) | |
| tree | 42f533a45605d2614eaef25446aec5cd03471ad1 /llvm/test/Transforms/LoopInstSimplify | |
| parent | 954a012b4c75db77b99b259d9cc4edd8ab551c68 (diff) | |
| download | bcm5719-llvm-7425179fee9b4ed1ff6d366ee06487f05a1c0ab3.tar.gz bcm5719-llvm-7425179fee9b4ed1ff6d366ee06487f05a1c0ab3.zip | |
[LoopPassManager + MemorySSA] Only enable use of MemorySSA for LPMs known to preserve it.
Summary:
Add a flag to the FunctionToLoopAdaptor that allows enabling MemorySSA only for the loop pass managers that are known to preserve it.
If an LPM is known to have only loop transforms that *all* preserve MemorySSA, then use MemorySSA if `EnableMSSALoopDependency` is set.
If an LPM has loop passes that do not preserve MemorySSA, then the flag passed is `false`, regardless of the value of `EnableMSSALoopDependency`.
When using a custom loop pass pipeline via `passes=...`, use keyword `loop` vs `loop-mssa` to use MemorySSA in that LPM. If a loop that does not preserve MemorySSA is added while using the `loop-mssa` keyword, that's an error.
Add the new `loop-mssa` keyword to a few tests where a difference occurs when enabling MemorySSA.
Reviewers: chandlerc
Subscribers: mehdi_amini, Prazek, george.burgess.iv, sanjoy.google, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66376
llvm-svn: 369548
Diffstat (limited to 'llvm/test/Transforms/LoopInstSimplify')
| -rw-r--r-- | llvm/test/Transforms/LoopInstSimplify/basic.ll | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/test/Transforms/LoopInstSimplify/basic.ll b/llvm/test/Transforms/LoopInstSimplify/basic.ll index d6f177f07aa..a5f7222faf7 100644 --- a/llvm/test/Transforms/LoopInstSimplify/basic.ll +++ b/llvm/test/Transforms/LoopInstSimplify/basic.ll @@ -1,6 +1,6 @@ ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S %s -passes=loop-instsimplify | FileCheck %s -; RUN: opt -S %s -passes=loop-instsimplify -enable-mssa-loop-dependency=true -verify-memoryssa | FileCheck %s +; RUN: opt -S %s -passes='loop-mssa(loop-instsimplify)' -verify-memoryssa | FileCheck %s ; Test very basic folding and propagation occurs within a loop body. This should ; collapse to the loop iteration structure and the LCSSA PHI node. |
